Ugh! That would mean I have to stare at the "firmware update" required warning every time.
Do you know if they disabled being able to change flight parameters in debug mode such as max pitch and roll angle in sport mode?
I don't know what is going on with newer firmwares and how they interact TBH. I don't even notice the firmware update required notice now. If you have a dedicated device you can just turn off access to the internet and it won't know it's not up to date. Or you could just turn off access anytime you fire up the APP.
I too was disappointed when I bought mine that there was no ATTI mode. Seems most people don't understand or care what they're missing.